Olaf rye olsen



(No Model.)

0. R. OLSEN. ELEVATOR.

No. 495,598. Patented Apr. 18, 1893..

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f ITED STATES PATENT Ormea;

OLAF RYE OLSEN, OF INDIANAPOLIS, INDIANA.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 495,598, dated April18, 1893.

Application filed October 14, 1892. Serial No.448,825 (No model.)

To all whom it may concern.:

Be it known that I, OLAr` RYE OLSEN, acitizen of the United States,residing at Indianapolis, inthe county of Marion and State of Indiana,have invented certain new and useful Improvements in Elevators, of whichthe following is a specification.

The object of my said invention is to cause the operating mechanism ofan elevator to cease movingwheneveranyobstruction causes the elevatorcage or platform to cease descending.

It consists of such a construction and arrangement of parts that thehoisting or Windlng drum will automatically fall into contact with abrake whenever this occurs, stopping it from further rev0lution,'whileat the same time a spring-engaged clutch will permit the shaft tocontinue to revolve without moving the drum.

Said invention will be rst duly described, and the novel featuresthereof then pointed out in the claims.

Referring to the accompanying drawings, which are made a part hereof,and on which similar letters of reference indicate similar parts, Figurel is a view of a hatch-way containing the usual elevator` guides andcage or platform, alongside which the driving mechanism is shown in sideelevation; Fig. 2 a central sectional view on an enlarged scale lookingtoward the left from the dotted line 2 2 in Fig. l; Fig. 3 a transversesectional view of the shaft and its outer bearing, on the dotted line 33 in Fig. 2,fand Fig. 4 a detail under side View, partly in plan andpartly in section, as seen when looking upwardly from the dotted line L4 in Fig. 2.

In said drawings the portions marked A represent an ordinary elevatorcage or platform; B the hoisting cable; C the hoisting drum; D the shaftupon which said drum is mounted; E a clutch also on said shaft by whichthe hoisting drum is driven, and F the driving shaft carrying the beltpulleys.

The elevator shown, is, in many of its features, similar to otherelevators. As will he readily understood, when the mechanism is set inmotion to wind up the hoisting cable B, it raises the elevator cage orplatform Ayand when it is set in motion to unwind said cable, said cageor platform will descend. The shaft F is driven by belts running overloose and tight pulleys F F2 F3 thereon, in an ordinary and well knownmanner, and, by means of the screw gearsf mounted thereon, and gear CZmounted on the shaft D, drives said shaft D and its clutch and thehoisting drum, as will be readily understood. These parts A and B andthe general operation of the elevator, therefore, need no furtherdescription.

The shaft D is so mounted in its boxes D D2, however, that when the drumC is relieved from the lifting pull of 4the hoisting cable, it

with said drum will descend slightly. The construction shown by whichthis is effected, consists in a pivot support d for the box D whichenables it to tip as occasion may require, while the box D2 is Providedwith adjustable supports and stops d2. As shown in Fig. 2, when theupward pull of the hoisting cable on the drum is relieved, it and theshaft are permitted to descend slightly, when it (the box D2) will restupon the lower one of the stops cl2, instead of being pulled into closecontact with the upper one of said stops, as shown in said figure. Whenthis is done a flange or other surface portion of the hoisting drum willdrop into contact with a stationary friction brake O which is securedrigidly to adjacent structure, (by means of supporting and brac-ing rodsO2, or otherwise,) and is held firmly to one po sition, said positionbeing such that the drum will be free from it when raised up by the pullof the hoisting cable, but in contact therewith when for any reason saidpull is relieved.

The hoisting drum, of course, is so mounted as to revolve on the shaft Dand to permit such shaft to revolve independently thereof, except whenthe two are locked together by means of the clutch-part E. Saidclutch-part E is so mounted on the shaft D as to have a limitedlongitudinal movement thereon, but it cannot revolve independentlythereof. A spring E is interposed between said clutch part and a collare, which latter is secured to the shaft D alongside the box D. Theclutch is by this means always held into contact, except in case whenthe shaft D is revolving in that direction that it moves when theelevator cage is descending. If the drum is by any means stopped fromrevolving, the clutch-part E (which is secured to the shaft D) will, aswill be readily understood, slip backward over the part attached to orforming part of the hub of the drum O. Thus, when, by accident, anythingintercepts the path of the descending cage, and the pull on the drum isthus relieved, it will fall into contact with its brake, and there Willbe no further un winding of the hoisting cable. In such a case, ofcourse, it is expected that the operator will at once shift the belts,stopping the entire mechanism, but in case this is not done, no furtherharm will result from the continued revolution of the mechanism thansome wear upon the clutch-teeth.

As shown in Fig. 2, the space between the support d2 and the bottom ofthe socket into which it enters, in the under side of the box D2, isquite small, and it is only necessary that the movement of thismechanism on the pivot d should be sufiicient to throw the adjacentsurface of the hoisting drum into and out of contact with the brake C.Indeed,the pivot d may be wholly dispensed with,if the bearing of theshaft D in its box D is made somewhat loosef but I have shown a pivotedbox as being a better construction.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combinatiomin an elevator mechanism, of a shaft carrying ahoisting drum, and a brake held in close relation thereto, said shafthaving vertically moving bearings and said hoisting drum being adaptedto drop into frictional contact with said brake whenshaft, and adaptedto engage with and drive said drum, and a brake secured in closeproximity to said drum or a flange thereon, substantially as shown anddescribed.

3. The combination, in an elevator mechanism, of a brake for thehoisting drum, said hoisting drum, its shaft, a pivoted bearing Dtherefor at one end, a movable bearing therefor at the other end, saidhoisting drum being loosely mounted on said shaft and provided Vwith aclutch-face, another clutch part mounted on said shaft and adapted toengage with the clutch-part on said drum, and a spring whereby saidlast-named clutch-part is ordinarily held forward into engagement', butwhich permits the same to be forced back out of engagement uponoccasion, substantially as and for the purposes set forth.

In witness whereof I have hereunto set my hand and seal, atIndianapolis, Indiana, this 10th day of October, A. D. 1892.

OLAF RYE OLSEN. [L s] Witnesses:

CHESTER BRADFORD, JAMES A. WALSH.

